Contemporaneous broadband SED for the low state during the MWL campaign in 2010. The blue open circle depicts the energy flux computed using all the MAGIC observations during the MWL campaign in 2010, after excluding the data during the VHE flare from 2010 July 16. This MAGIC data point contains a gamma-ray excess with a signal significance (calculated using Eq. (17) of Li & Ma 1983) of 1.4σ. The blue arrows report the 95% confidence level energy flux upper limits derived from the MAGIC observations. The cyan filled squares represent the averaged Fermi-LAT spectrum from the MWL campaign in 2010 (MJD: 55 382–55 458). The cyan arrows report the Fermi-LAT 95% confidence level energy flux upper limits for the energy bins with TS < 4. The gamma-ray data points and upper limits were corrected for attenuation on the EBL using a redshift z = 0.18 and the model from Franceschini et al. (2008). The blue filled circles show the Swift-XRT, Swift-UVOT, optical, and radio data obtained during the days when MAGIC observed the source (with the exception of July 16). The gray filled circles show all the radio/optical/UV/X-ray data taken during the MWL campaign in 2010, excluding July 16 and July 29. The magenta solid curve represents the resulting intrinsic spectrum parameterized with a one-zone SSC model. See text for further details.